PWM calculation correction.

- The PWM calculation was a little bit off and has been corrected.

- Edited the unused settings strings to be smaller and just show what
the settings are, rather than include units. May include this in the
master build, if it fits.

- The minimum spindle PWM define in config.h needed to be update for
cpu map compatibilty.

doc/log/commit_log_v1.1.txt

@@ -1,3 +1,13 @@
+----------------
+Date: 2016-11-04
+Author: Sonny Jeon
+Subject: Fixed a g-code parser issue caused by last commit.
+
+- G-code parser refactoring in the last commit wasn’t tested. Found and
+fixed issues with G28.1/30.1 and G38.x probe commands. They were not
+being accepted due to a borked mantissa check.
+
+
 ----------------
 Date: 2016-11-04
 Author: Sonny Jeon